Core Return Deadline Tracker

Treat the return as part of the installation job, not a later admin task: photograph the core at removal (condition disputes are won with timestamps), pack it the same week, ship trackably, and watch the deadline like an inspection date — this board's 7-day amber exists because the failure mode is pure forgetting. The at-risk total tile is motivational by design: it's the sum that bills itself if nobody acts.

The formality is thirty seconds per event; the informal alternative is priced in core charges lost, warranties unfiled, stockouts mid-inspection and audit findings. Small operations arguably need the discipline MORE — there's no purchasing department catching these by process, so the structure has to live in the tool. One recovered core charge typically pays for years of the habit.

No account and no connection are needed once the page has loaded — records live in local storage on your device and every calculation runs in your browser. Data doesn't sync between devices, so export the CSV when you want to move or archive your records.

A plain CSV with one row per entry and labelled column headers — the most portable format there is. Spreadsheets open it directly, most specialised software can map it on import, and a printed copy is perfectly legible to a human reviewer. Nothing proprietary means your parts record is never trapped here.